Palindromes with exactly 3 distinct palindromic prime factors.

Terms

a(0) =66a(1) =606a(2) =2222a(3) =2882a(4) =3333a(5) =5555a(6) =6886a(7) =7777a(8) =26462a(9) =39693a(10) =145541a(11) =167761a(12) =226622a(13) =248842a(14) =339933a(15) =347743a(16) =662266a(17) =664466a(18) =668866a(19) =682286a(20) =993399a(21) =996699a(22) =2080802a(23) =2284822a(24) =6080806a(25) =6264626a(26) =9396939a(27) =11444411a(28) =11666611a(29) =11777711